common/Formatter.h: remove twice included <list>

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>
mon/AuthMonitor.cc: remove twice included <sstream>

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>
mon/LogMonitor.cc: remove twice included <sstream>

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>
mon/MDSMonitor.cc: remove twice included MonitorDBStore.h

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>
test/test_snap_mapper.cc: remove twice included <tr1/memory>

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>
Merge pull request #137 from dalgaaf/wip-da-cleanup-includes

Cleanup some twice included header

Reviewed-by: Sage Weil <sage@inktank.com>